Metallic tungsten carbide nanoparticles as a near-infrared-driven photocatalyst

被引：47
|
作者：
Huang, Weicheng [1 ]
Meng, Hongxue [3 ]
Gao, Yan [2 ]
Wang, Jinxin [1 ]
Yang, Chunyu [2 ]
Liu, Danqing [4 ]
Liu, Jian [1 ]
Guo, Chongshen [2 ]
Yang, Bin [1 ]
Cao, Wenwu [1 ,5 ,6 ]
机构：
[1] Harbin Inst Technol, Sch Instrumentat Sci & Engn, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150080, Heilongjiang, Peoples R China
[3] Harbin Med Univ Canc Hosp, Dept Pathol, Harbin, Heilongjiang, Peoples R China
[4] Harbin Univ Sci & Technol, Sch Chem & Environm Engn, Harbin 150040, Heilongjiang, Peoples R China
[5] Penn State Univ, Dept Math, University Pk, PA 16802 USA
[6] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 31期
基金：
中国国家自然科学基金;
关键词：
UV; NANOSTRUCTURES; MECHANISM; WO3-X;
D O I：
10.1039/c9ta03151k
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Employing near infrared (NIR) light for photocatalytic reactions is preferable, considering effective solar utilization. Herein, the metalloid of tungsten carbide (WC) was used as an NIR-driven photocatalyst for the photodegradation of organic pollutants for the first time. The noble metal-like electronic properties of WC were proven via the analysis of its electronic occupied state using ultraviolet photoelectron spectroscopy and valence band XPS. In addition, both the experimental evidence and 3D finite element simulation revealed the NIR-responsive localized surface plasmon resonance (LSPR) behavior of the WC nanoparticles. Accordingly, the WC nanoparticles exhibited excellent UV-visible-NIR full-spectrum absorption, high NIR-triggered photocurrent response and resultant NIR-driven photocatalytic degradation performance. The NIR-mediated photocatalytic mechanism of WC was proposed based on a radical scavenging test, fluorescence observation of radical generation and spin-trapping electron paramagnetic resonance measurements. Hence, metallic WC with NIR absorption and photocatalytic activity may pave the way for the design of full-solar-spectrum-responsive photocatalysts.
引用
收藏
页码：18538 / 18546
页数：9
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